Systems and methods for primitive sequence capture and retransmission in a network device

Abstract

Method and systems for a network device are provided. The method includes receiving configuration data having a primitive sequence comprising a first primitive and a second primitive at a first clock rate at a port of the network device; writing the configuration data into a smoothing module of the port at the first clock rate; reading the configuration data out of the smoothing module at a second clock rate; allowing a primitive to be inserted or deleted in the smoothing module to prevent smoothing module underflows or overflow; regenerating the primitive sequence at the second clock rate; and transmitting the regenerated primitive sequence to the destination port.

What is claimed is: 
     
       1. A machine implemented method for a network device, comprising:
 receiving configuration data having a primitive sequence comprising a first primitive and a second primitive at a first clock rate at a port of the network device, wherein the received configuration data is destined for a destination port using a switch port bypass mode; and the port includes a plurality of sub-ports that can each be configured to operate as independent ports for sending and receiving information using one of a plurality of network links at a plurality of rates complying with a plurality of protocols; 
 writing the configuration data into a smoothing module of the port at the first clock rate; 
 reading the configuration data out of the smoothing module at a second clock rate; 
 allowing a primitive to be inserted or deleted in the smoothing module to prevent smoothing module underflows or overflow; 
 regenerating the primitive sequence at the second clock rate; and 
 transmitting the regenerated primitive sequence to the destination port. 
 
     
     
       2. The method of  claim 1 , wherein receiving configuration data further comprises capturing the configuration data in a holding register of a physical coding sub-layer (PCS). 
     
     
       3. The method of  claim 1 , wherein transmitting the primitive sequence further comprises transmitting the first primitive and second primitive as a pair. 
     
     
       4. The method of  claim 1 , further comprising receiving an Idle primitive in data received at the port; and transitioning from transmitting the primitive sequence to transmitting the received data to the destination port. 
     
     
       5. The method of  claim 1 , wherein one of the plurality of sub-ports is configured to operate as an Ethernet port in the switch bypass mode. 
     
     
       6. The method of  claim 1 , wherein the second clock rate comprises an internal system clock rate of the network switch element. 
     
     
       7. The method of  claim 1 , wherein the network device is a switch element coupled to a first network device and a second network device for receiving the configuration data from the first network device and transmitting the configuration data to the second network device. 
     
     
       8. A system, comprising:
 a network switch element coupled to a first network device and a second network device via a plurality of network links; 
 wherein the network switch element comprises: a processor for executing firmware code; and a first port having a plurality of sub-ports that can each be configured to operate as independent ports for sending and receiving information using one of the plurality of network links at a plurality of rates complying with a plurality of protocols; and a smoothing module for storing information received by the first port; and 
 wherein the processor executable firmware code determines when the first port receives configuration data, including a primitive sequence having a first primitive and a second primitive from the first network device at a first clock rate and destined for the second network device in a bypass mode; writes the configuration data into the smoothing module at the first clock rate; reads the configuration data out of the smoothing module at a second clock rate; inserts or deletes a primitive in the smoothing module to prevent smoothing module underflow or overflow condition; regenerates the primitive sequence at the second clock rate when the primitive sequence is detected in the receive data; and transmits the regenerated primitive sequence to the second network device. 
 
     
     
       9. The system of  claim 8 , wherein the primitive sequence is transmitted in pairs. 
     
     
       10. The system of  claim 8 , wherein the received configuration data is captured in a holding register of a physical coding sub-layer (PCS). 
     
     
       11. The system of  claim 10 , wherein the smoothing module is a part of the PCS. 
     
     
       12. The system of  claim 8 , wherein one of the plurality of sub-ports is configured to operate as an Ethernet port in the switch bypass mode. 
     
     
       13. The system of  claim 8 , wherein the second clock rate comprises an internal system clock rate of the network switch element. 
     
     
       14. A network switch element, comprising:
 a processor for executing firmware code; 
 a first port having a plurality of sub-ports that can each be configured to operate as independent ports for sending and receiving information using one of the plurality of network links at a plurality of rates complying with a plurality of protocols; and 
 a smoothing module for the first port for receiving configuration data from a first network device and destined for a second network device while the first port operates in a bypass mode; 
 wherein the processor executable firmware code: determines when the first port receives configuration data having a primitive sequence including a first primitive and a second primitive, from the first network device at a first clock rate, writes the configuration data into the smoothing module at the first clock rate; reads the configuration data out of the smoothing module at a second clock rate; allows a primitive to be inserted or deleted in the smoothing module to prevent smoothing module underflow or overflow conditions; regenerates the primitive sequence at the second clock rate when the primitive is detected; and transmits the regenerated primitive sequence to the second network device. 
 
     
     
       15. The network switch element of  claim 14 , wherein the received configuration data is captured in a holding register. 
     
     
       16. The network switch element of  claim 14 , wherein the primitive sequence is transmitted in pairs. 
     
     
       17. The network switch element of  claim 14 , wherein the smoothing module is a part of a physical coding sub-layer (PCS) of the first port. 
     
     
       18. The network switch element of  claim 14 , wherein one of the plurality of sub-ports is configured to operate as an Ethernet port in the switch bypass mode. 
     
     
       19. The network switch element of  claim 14 , wherein the second clock rate comprises an internal system clock rate of the network switch element. 
     
     
       20. The network switch element of  claim 14 , wherein one of the sub-ports is configured to operate as a Fibre Channel port.